MANUFACTURER
Raise pH so the developing agent works fast enough.
Borax Sodium tetraborate x 5H2O - 1000g
€7.01
Net price: €5.70
Borax Sodium tetraborate x 5H2O - 10g
€1.72
Net price: €1.40
Borax Sodium tetraborate x 5H2O - 25 000g
€93.52
Net price: €76.03
Borax Sodium tetraborate x 5H2O - 5000g
€28.06
Net price: €22.81
Borax Sodium tetraborate x 5H2O - 500g
€4.68
Net price: €3.80
Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 1000g
€8.39
Net price: €6.82
Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 100g
€2.80
Net price: €2.27
Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 25 000g
€116.90
Net price: €95.04
Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 5000g
€37.28
Net price: €30.31
Potassium Carbonate ( K2CO3 ) Anhydrous - Drying Agent - - 500g
€4.66
Net price: €3.79
Sodium Hydroxide ( Lye ) Caustic Soda - 1000g = 1kg
€6.78
Net price: €5.51
Sodium Hydroxide ( Lye ) Caustic Soda - 100g
€2.15
Net price: €1.75
Sodium Hydroxide ( Lye ) Caustic Soda - 25 000g = 25kg Bag
€86.50
Net price: €70.33
Sodium Hydroxide ( Lye ) Caustic Soda - 500g
€4.19
Net price: €3.41
Potassium carbonate anhydrous 99.5% PureLand AR/ACS Op.1000g
€53.30
Net price: €43.34
Potassium carbonate anhydrous 99.5% PureLand AR/ACS Op.500g
€28.43
Net price: €23.11
PureLand anhydrous potassium carbonate, hard packed, 1000 g HDPE bottle
€9.77
Net price: €7.94
PureLand potassium carbonate anhydrous chda op.250g HDPE bottle
€4.00
Net price: €3.25
Soda lye, SODIUM HYDROXIDE SOLUTION 50%
€30.39
Net price: €24.71
Sodium Carbonate - Soda ash ( Ammoniacal ) Sodium Carbonate Light
€4.68
Net price: €3.80
SODIUM CARBONATE standard solution 0.05 MOL/L OP. 1L PureLand
€17.77
Net price: €14.45
Sodium carbonate, anhydrous 99.5% Loba AR Op.500 g
€16.21
Net price: €13.18
Sodium carbonate, anhydrous 99.5% Loba extra pure op.500 g
€12.22
Net price: €9.93
Sodium hydroxide (caustic soda) PureLand chda microgranules op.1kg HDPE bottle
€8.84
Net price: €7.19
SODIUM HYDROXIDE 1 MOL/L titrated solution OP. 1L PureLand
€12.59
Net price: €10.24
Most developing agents only work well at elevated pH. Alkalis raise the solution pH, converting the developer into its more reactive form and speeding up electron transfer to silver halide. Think of alkali as the “throttle”: higher pH = faster development, higher effective film speed, and often higher contrast.
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Carbonates (sodium/potassium carbonate) are common because they’re strong enough for normal development and provide good buffering.
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Hydroxides are very strong and can produce “high-energy” developers — fast, punchy, but easier to overdevelop or fog.
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Borax/metaborate are gentler, used when you want smoother tones or lower contrast.